APA (7th ed.) Citation

Bulgaria & United States. (2021). Scientific and technical cooperation: Agreement between the United States of America and Bulgaria, signed at Sofia, February 16, 2021; entered into force February 16, 2021. United States Department of State.

Chicago Style (17th ed.) Citation

Bulgaria and United States. Scientific and Technical Cooperation: Agreement Between the United States of America and Bulgaria, Signed at Sofia, February 16, 2021; Entered into Force February 16, 2021. [Washington, D.C.]: United States Department of State, 2021.

MLA (9th ed.) Citation

Bulgaria and United States. Scientific and Technical Cooperation: Agreement Between the United States of America and Bulgaria, Signed at Sofia, February 16, 2021; Entered into Force February 16, 2021. United States Department of State, 2021.